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简述觉醒与睡眠的生理基础。

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2017年某作家的长篇小说由～家出版社出版，按合同规定，出版社向作家预付稿酬5000元，作品出版后再付稿酬10000元；同年该作家还授权某晚报连载该小说。历时60天。每天支付报酬180元，共获得稿酬10800元。该作家上述稿酬所得应缴纳的个人所得税为（）元。

A. 2240.00
B. 2889.60
C. 3248.00
D. 3449.60

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进行相关与回归分析应注意对相关系数和回归直线方程的有效性进行检验。（）

A. 正确
B. 错误

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检修发电机、高压电动机应填用（）

A. 第一种工作票
B. 第二种工作票
C. 动火工作票
D. 动土工作票

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You work as the enterprise exchange administrator at TestKing.com. TestKing.com makes use of Microsoft Exchange Server messaging solution. The TestKing.com network consists of a single ActiveDirectory forest that contains a single named testking.com. TestKing.com has its headquartets in Chicago and 15 branch offices around the globe， which are configured as Active Directory sites. The branch offices of Testking.com are connected to the Chicagooffices and directly to the Internet. For the future， all the branch offices should have Exchange Server 2010 Hub Transport server that hasfollowing characteristics： 1. The Internet connections of the branch offices should be used to send e-mail. 2. The e-mail messages from the branch offices to the Chicago offices should go via a WAN link. 3. The branch offices should not use the WAN link to send e-mail to via the Internet 4. Administrative overhead should be reduced. What should you do？（）

A. The best option is to use 10 Send connectors at every office.
B. The best option is to use one SMTP site link at every office.
C. The best option is to use one Send connector at every office.
D. The best option is to use two Send connectors at every office.

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